Thread trap for shuttles



Aug; 26, 1945?. w. J. GOSSELIN THREAD TRAP FOR SHUTTLES Filed July 3,1946 ATTORNEY Patented Aug. 26, 19 47 2,426,449 THREAD TRAP FORsHU'rTLEs Wilfrid Joseph Gosselin, Methuen, Mass., assignor to U SBobbin & Shuttle 00., Providence, R. L, a corporation of Rhode IslandApplication July 3, 1946, Serial No. 681,265

6 Claims. (Cl. 139-223) This invention relates to shuttles of theautomatic or self-threading type but it can be used equally well onhand-threading shuttles of many types.

The main purpose is to provide a shuttle having a body of wood or othersuitable material with a metal shuttle block, both so arranged that thethread running off from the bobbin during or after transfer can go downthrough a longitudinal threading chamber underneath a nose and then downand back diagonally through a threading slot toward the outside of theshuttle and thence up and into a shuttle eye hole where it is trapped inposition in such a way that it cannot unthread, if at all, except underthe most unusual and unlikely conditions.

The principal new features are the arrangement of the front of what Iwill call the shuttle block eye projection and the back edge of theshuttle block recess whereby the back edge of the wood at the front ofthe shuttle block recess slightly overlaps the front edge of the eyeprojection of the block, and the formation of the shuttle eye projectionwitha transverse eye hole at the inside end of which is a bearing pinand at the front and back of theoutside or outlet of which there arepreferably upwardly extending guide and friction pins which are drivenup into or positioned in pin holes extending up from the bottom of theshuttle block.

Such pins can be made of Very hard steel, porcelain or other wearresistant material and can be replaced if they break or wear downwithout affecting the rest of the shuttle block.

The important feature is that the bottom of this eye projectionpreferably is in a plane with the bottom of the rest of the shuttleblock and there are at the bottom two downwardly extending legs onebehind and one in front of the eye hole. One leg I will call forconvenience the back leg while the other in front of this I will callthe front leg which is shorter than the back leg whereby there is anentering passage forming part of the threading slot down under the frontleg and then up between the two legs into the eye hole proper.

- This eye hole extends crossways through the eye projection and thethreading block into the threading chamber in front of, a center orangle pin so that when threaded the thread passes part way through thethreading chamber and thence around this center pin and out through theshuttle eye hole. Y

I utilize the fact that along the eye side of almost every shuttle thereis a thread groove of segmental contour by providing an eye outlet inthe wood, forming part of the block recess, which extends down and outat the side and at the bottom is so arranged that its top edge will bepart of the thread groove and Will project slightly above or overlap thebottom of the front leg, there being also a space laterally between thefront leg and the inside of the wood below the eye outlet in the wood topermit the thread to go down through the threading slot and up into theeye but to prevent-its coming out. v

I prefer to have a strip or layer of fibre or other tough, wearresistant, hard material along the eye side of the shuttle in which thethread groove is formed and in which is formed the bottom of the eyeoutlet. I

I prefer to use a threading block with an extra long bearing surfacewhere it rests on the wood in the block recess to prevent rocking orloosening as either might cause some part ofthe threading slot to be toonarrow and tend to break the thread while it was threading.

In the drawings, i

Fig. 1 is a plan view of the front or eye end of a shuttle with ashuttle block of my construction in place and with the thread from abobbin passing out of the eye.

Fig. 2 is a perspective View looking down from the front and side of theshuttle block shown in Fig. 1 when removed from the shuttle.

Fig. 3 is a sectional view on line 3-3 of Fig. 1 through the wood, theshuttle block being shown in elevation,

Fig. 4 is an enlarged side elevational view from th eye side of theshuttle shown in Fig. 1 with parts broken away.

Fig; 5 is a plan View similar to Fig. 1, showing a somewhat modifiedtype of shuttle and block and Fig. 6 is a side'elevation of a shuttleblock of the type shown in Fig. 5 removed from the shuttle.

Fig. '7 is asectional view through the wood on line of Fig. 1, but withthe shuttle block in elevation, the cut away part of the eye outlet inthe wood beingshown with a somewhat wider thread groove than that shownin Fig. 3. r

Fig. 8 is a view of part of the bottom of a shuttle block with bearingpins in place and Fig. 9 is a detail of a preferred construction of mythread trap.

In the drawings Figs. 1 to 4 show a shuttle with the preferredembodiment of my invention. A represents a shuttle with the usual tip H)and a bobbin chamber l in which the bobbin B is positioned so that thethread T can unwind.

through a threading chamber 6 in the metal block G in front of which isa thread recess which extends along and forward near tip Hi. There isalso in the side of the shuttle body a thread groove 2|] of segmentalcontour with a bottom edge 24 and the top edge 25.

There is also a block recess indicated altogether by C in whichthethreading block G fits. Recess C has a bottom 2|, a front part l8 with adownwardly and backwardly sloping back edge and an eye outlet 26 in thewood body. The bottom: of eye outlet 26 at 23, as shown, coincides withthe bottom edge 24 of the thread groove 20 and inside this the wood iscut away at 2T to formv part of the threading slot F"whi'ch extendsfromunder guide 1 and nose 9 into the eyeholeSE.

The threading block G has sides 3 and d-which, as shown, are of V-shapeand the whole block is much longer than those commonly used' so that itwill counteract the tendency of some blocks to gradually wear loose onthe attaching screw S which passes through the side of the shuttle at 40and the shuttle block at 41- to hold the block in place. I

This block G has a bottom 5 which, asshown; coincides with the bottom 2|of recess Cand 43 of the back leg. 3| and: has athreading chamber 3which extends from the front of the bobbin chamber towards the nose 9which is under and a little to the side of-the overhanging guide I, bothof well known form. Italso has a front leg 32 which is-shorter than. leg3| and there is therefore a passage 52 under its bottom 3 3-for-mingpart of threading slot F.

At 2 there is an eye projection extending out towards what I will callthe eye side of the shuttle and through this extends an eye hole 3% atthe bottom of which is an. inlet 31- with an outside 38, there beingalsoat itsinside or inner end a center or angle pin 65 around which thethread bends when it runs from the threading. chamber 6 through the eyehole-3 6 and thence to the outside 38.

The front edge 30 of this eye projection 2- extends a little forward ofthe backedge It near the front of the block recess C, leaving a space 50which forms part of the threading slot F which connects with the space5-2 atthe bottom 33 of the front leg 32 passing around thecurved part 34of the front edge, thence up between the front and. back legs 32 and 3|aspart 31 of slot'F-into the eye hole 36.

Preferably I form holes l4 and It in the back leg and the front leg andup through these: I drive the bearing pins l3 and I5 so that when thethread T is actually threaded and is passing out the eye hole 36 and ismoving back and: forth inthe thread groove 20, they will take: up thewear. One or both friction pins- I3 and I5 can be cemented into place inits pin hole preferably with an adhesive which can be softened by heatif it becomes necessary or desirable to remove a pin so as to replace itwith anew one.

53 is the bottom of the back leg 31 and as shown, is level with thebottom 2| of the block recess, of the bottom 5, of block G and of thecut away part 21-. 33' is the bottom of the front leg 32, which, asshown, is curved at 34 and is spaced at 52 from the bottom 2| of theblock recess to allow the thread to pass.

As shown in Figs. 5 and 6, there maybe" modifications of my trap asfollows:

The shuttle body, except for the \ff-shaped cut away part to'fit theV-shaped sides 3' and 4- is:' the same as in the first construction. 7

A represents a shuttle body of a well known type with a bobbin chamber6|, the end of which at 62 is rounded, and H represents a shuttle blockwhich does not have the V-shaped legs shown and described but ends atthe point 60. It has the usual fastening hole ii and downward projection42 as well as the guide 1 and eye projection 64 similar to 2, theseparts being the same as in the other'vi'ewsibut instead of using pinsdriven into holes extending upwards in the long and short legs, I showthe short leg 55 and the long leg 46 with no pin holes but there is thepassage 4'! between them into an eye hole 48.

This shuttle block H may be of chromium plated metal: or may be made ofsome other hard metal, but" in any event,th'e bottom of short leg shouldextend a triflebelow the bottom edge 28 of the eye outlet, such as 26,in the wood, but not down to the bottom of part 52 of the threading slotF and ofthe cut away part 27.

The front edge of eye projection 64, is preferably positioned in frontof the back edge H of the shuttle block recess in the wood: but whilebottom N of which is below and parallel with thebottom edge-28 of theeye outlet in the wood. As shown in Fig. '7, there may be a strip offibrerO along the eye side in which thread groove 29 is formed and inwhich is formed the bottom edge 28 of the eye outlet, the wood being cutaway at 21, leaving the fibre on the outside.

I- prefer to havefriction plates E of the spring pressedtype andextending down and forward,

similar to thoseshown in patent to Park, No. 2,087,607 of July 20, 1937,and in: addition to this, I prefertohave the backfriction pin It, asshown in Fig: 9;. sloping: down and forward while the front pin-"it canbe vertical and I also prefer to showarelatively narrow thread groove'12 along theside of the shuttle sothat itsbottom edge M will be abovethe bottom edgeilof the eye'outlet irr the Wood.

The" friction plates take out the kinks, help" to keepthethread; fromrunning wild and: tend to keep the thread down while the pin tends .1 tokeep: it up and the narrow groove '52 helps and the' bottom of the frontleg and the overlap ping of the frontedge, such as 39; of the block and:the back edge H of the front of't'he'shuttle block re-cess in the woodtoprevent u-nthreading. The overlapping of the. bottom of the eye outletand the bottom of the front leg and ofthe back edge of the front ofthe'block recess and the front of the block are the most necessaryfeatures of my shuttle eye thread trap;

I claim:

1. The combination with a shuttle of the automatic type having. a bodywith a thread Eye in its side near its, front end,.a threa'd groovealong the eye side, a bobbin chamber, and a shuttle block recessextending from a .point in front of the" stock on the inside from thebottom of the eye outlet being cut away down to the bottom of theshuttle block recess; of a shuttle block positioned in the shuttle blockrecess, including a longitudinal threading chamber and .a nose ononeside of the threading chamber near the front of the shuttle blockrecess and an eye projection which extends into the eye outlet in thewood, said shuttle block including a guiding front edge extendingdiagonally down and back from said nose, spaced from and extendingforward of the back edge of the front wall of the shuttle block recess,to a front leg extending down below the bottom of the eye outlet to nearthe bottom of the shuttle block recess, and a back leg extending down tothe bottom of said recess, there being a passage under the front leg andan inlet passage between the two legs up into an eye hole in the shuttleblock, there being upwardly extending holes from the bottom of the frontleg and from the bottom of the back leg, together with friction pins ofhard material positioned one in the hole in the front leg and the otherin the hole in the back leg, the hole and the pin in the back legsloping down and forward; and friction plates extending down and forwardinto the threading chamber.

2. The combination with a shuttle of the automatic type having a bodywith a thread eye in its side near its front end, a thread groove alongthe eye side, a bobbin chamber, and a shuttle block recess extendingfrom a point in front of the thread eye back to the bobbin chamber, saidshuttle block recess including a diagonal front wall and an eye outletin the side which extends down into and along the thread groove in theside, the stock on the inside from the bottom of the eye outlet beingcut away down to the bottom of the shuttle block recess; of a shuttleblock positioned in the shuttle block recess, including a longitudinalthreading chamber and a nose on one side of the threading chamber nearthe front of the shuttle block recess and an eye projection whichextends into the eye outlet in the wood, said shuttle block including aguiding frontedge extending diagonally down and back from said nose,spaced from and extending forward of the back edge of the front wall ofthe shuttle block recess, to a front leg extending down below the bottomof the eye outlet to near the bottom of the shuttle block recess, and aback leg extending down to the bottom of said recess, there being apassage under the front leg and an inlet passage between the two legs upinto an eye hole in the shuttle block, there being upwardly extendingholes from the bottom of the front leg and from the bottom of the backleg, together with friction pins of hard material positioned One in thehole inthe front leg and the other in the hole in the back leg, the holeand the pin in the back leg sloping down and forward.

3. The combination with a shuttle of the automatic type having a bodywith a thread eye in its side near its front end, a thread groove alongthe eye side, a bobbin chamber, and a shuttle block recess extendingfrom a point in front of the thread eye back to the bobbin chamber, saidshuttle block recess including a diagonal front wall and an eye outletin the side which extends down into and along thethread groove in theide, the stock on the inside from the bottom .6 of the eye outlet beingcut away down to the bottom of the shuttle block recess; of a shuttleblock positioned in the shuttle block recess, including a longitudinalthreading chamber and a nose on one side of the threading chamber nearthe front of the shuttle block recess and an eye projection whichextends into the eye outlet in the wood, said shuttle block including aguiding front edge extending diagonally down and back from said nose,spaced from and extending forward of the back edge of the front wallv 0fthe shuttle block recess, toa front leg extending down below the bottomof the eye outlet to near the bottom of the shuttle block recess, and aback leg extending down to the bottom of said recess, there being apassage under the front leg and an inlet passage between the two legs upinto an eye hole in the shuttle block, there being upwardly extendingholes from the bottom of the front leg and from the bottom of the backleg, together with friction pins of hard material positioned one in thehole in the front leg and the other in the hole in the back leg.

4. The combination with a shuttle of the automatic type having a bodywith a thread eye in its side near its front end, a thread groove alongthe eye side, a bobbin chamber, and a shuttle block recess extendingfrom a point in front of the thread eye back to the bobbin chamber, saidshuttle block recess including a diagonal front wall and an eye outletin the side which extends down into and along the thread groove in theside, the stock on the inside from the bottom of the eye outlet beingcut away down to the bottom of the shuttle block recess; of a shuttleblock positioned in the shuttle block recess, including a longitudinalthreading chamber and a nose on one side of the threading chamber nearthe front of the shuttle block recess and an eye projection whichextends into the eye outlet in the wood, said shuttle block including aguiding front edge extending diagonally down and back from said nose,spaced from and extending forward of the back edge of the front wall ofthe shuttle block recess, to a front leg extending down below the bottomof .the eye outlet to near the bottom of the shuttle block recess, and aback leg extending down to the bottom of said recess, there being apassage under the front leg and an inlet passage between the two legs upinto an eye hole in the shuttle block.

5. The combination with a shuttle of the automatic type having a bodywith a thread eye in its side near its front end,'a thread groove alongthe eye side, a bobbin chamber, and a shuttle block recess extendingfrom a point in front of the thread eye back to the bobbin chamber, saidshuttle block recess including a diagonal front wall and an eye outletin the side, the stock on the inside from the bottom of the eye outletbeing cut away; of a shuttle block positioned in the shuttle blockrecess, including a longitudinal threading chamber, a nose on one sideof the threading chamber near the front of the shuttle block recess andan eye projection which extends into the eye outlet in the wood, saidshuttle block including a guiding front edge extending diagonally downand back from said nose, spaced from the front wall of the shuttle blockrecess, to a front leg extending down below the bottom of the eye outletto near the bottom of the shuttleblock recess, and a back leg extendingdown to the bottom of said recess, there being a pas-- sage under thefront leg and an inlet passage beshuttleblock.

6'. The-combination with av shuttle of the auto matic type having abod'ywith, a: thread eye: in its side near its front end, a thread groovealong the eye side, a bobbin chamber,. and, a. shuttle block recessextending, from a point in front of. the thread eye back to the bobbinchamber, said. shuttle. block recess including a diagonal front wall andan eye outlet in the side, the stock'on the inside: from the bottom ofthe eye outletbeing cut away; of a shuttle block positioned in theshuttle blockv recess, including a; longitudinal threading:chamber,.a;nose and an. eyet proj ection;

extending: diagonally down and back from: said nose, spaced; from thefrom: wall-i oi the shuttie' block recess, to." a front leg. extendingdown below the bottom of the eye.- outlet; and atback legextending downtothe' bottom of said recess there being a passage under the. front legand an inlet passage between the two: legs up into an. eye holetheshuttl'e block;

JZGS'EPH GLOSSEHN..

